CreateZoomLevels is the extension point a canvas addon replaces
wholesale, and OnLoad seeds a scale (1) before any addon has run.
OpenMapClassic's ladder is 27 steps from 0.0125 to 0.899 -- its whole
range below this file's own 1, because its stitched world is reached by
zooming out past a single zone -- so the canvas sat above its own
ceiling, and ZoomIn, which walks the ladder by value, found no step at
all above it.
ClampZoomToLevels is called from GetCanvasScale rather than from
CreateZoomLevels, because CreateZoomLevels is exactly the function the
addon will not have.
Also records where OpenMapClassic stands, measured: 808 textures in the
canvas subtree, 166 placed, spanning ~4600x3270 units of a 1002x668
canvas, with a ladder floor implying a world ~80000 units wide. The Era
map tree under it answers correctly; GetMapArtLayers answering one
constant for every map is the thread to pull next.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SgstFWtn1RxEJ5kVrpgYwn
gromandClaude Opus 5
3e8c995e27